Signal-Android/app/src/main/java/org/thoughtcrime/securesms/mediasend/AvatarSelectionBottomSheetDialogFragment.java

package org.thoughtcrime.securesms.mediasend;

import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

import androidx.annotation.AttrRes;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.StringRes;
import androidx.appcompat.widget.AppCompatTextView;
import androidx.core.util.Consumer;
import androidx.fragment.app.DialogFragment;
import androidx.recyclerview.widget.RecyclerView;

import com.annimon.stream.Stream;
import com.google.android.material.bottomsheet.BottomSheetDialogFragment;

import org.thoughtcrime.securesms.ClearProfileAvatarActivity;
import org.thoughtcrime.securesms.R;
import org.thoughtcrime.securesms.permissions.Permissions;
import org.thoughtcrime.securesms.util.ThemeUtil;

import java.util.ArrayList;
import java.util.List;

public class AvatarSelectionBottomSheetDialogFragment extends BottomSheetDialogFragment {

  private static final String ARG_OPTIONS      = "options";
  private static final String ARG_REQUEST_CODE = "request_code";
  private static final String ARG_IS_GROUP     = "is_group";

  public static DialogFragment create(boolean includeClear, boolean includeCamera, short requestCode, boolean isGroup) {
    DialogFragment        fragment         = new AvatarSelectionBottomSheetDialogFragment();
    List<SelectionOption> selectionOptions = new ArrayList<>(3);
    Bundle                args             = new Bundle();

    if (includeCamera) {
      selectionOptions.add(SelectionOption.CAPTURE);
    }

    selectionOptions.add(SelectionOption.GALLERY);

    if (includeClear) {
      selectionOptions.add(SelectionOption.DELETE);
    }

    String[] options = Stream.of(selectionOptions)
                             .map(SelectionOption::getCode)
                             .toArray(String[]::new);

    args.putStringArray(ARG_OPTIONS, options);
    args.putShort(ARG_REQUEST_CODE, requestCode);
    args.putBoolean(ARG_IS_GROUP, isGroup);
    fragment.setArguments(args);

    return fragment;
  }

  @Override
  public void onCreate(@Nullable Bundle savedInstanceState) {
    setStyle(DialogFragment.STYLE_NORMAL,
             ThemeUtil.isDarkTheme(requireContext()) ? R.style.Theme_Signal_BottomSheetDialog_Fixed
                                                     : R.style.Theme_Signal_Light_BottomSheetDialog_Fixed);

    super.onCreate(savedInstanceState);

    if (getOptionsCount() == 1) {
      askForPermissionIfNeededAndLaunch(getOptionsFromArguments().get(0));
    }
  }

  @Override
  public @Nullable View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    return inflater.inflate(R.layout.avatar_selection_bottom_sheet_dialog_fragment, container, false);
  }

  @Override
  public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
    RecyclerView recyclerView = view.findViewById(R.id.avatar_selection_bottom_sheet_dialog_fragment_recycler);
    recyclerView.setAdapter(new SelectionOptionAdapter(getOptionsFromArguments(), this::askForPermissionIfNeededAndLaunch));
  }

  @Override
  public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    Permissions.onRequestPermissionsResult(this, requestCode, permissions, grantResults);
  }

  @SuppressWarnings("ConstantConditions")
  private int getOptionsCount() {
    return requireArguments().getStringArray(ARG_OPTIONS).length;
  }

  @SuppressWarnings("ConstantConditions")
  private List<SelectionOption> getOptionsFromArguments() {
    String[] optionCodes = requireArguments().getStringArray(ARG_OPTIONS);

    return Stream.of(optionCodes).map(SelectionOption::fromCode).toList();
  }

  private void askForPermissionIfNeededAndLaunch(@NonNull SelectionOption option) {
    if (option == SelectionOption.CAPTURE) {
      Permissions.with(this)
                 .request(Manifest.permission.CAMERA)
                 .ifNecessary()
                 .onAllGranted(() -> launchOptionAndDismiss(option))
                 .onAnyDenied(() -> Toast.makeText(requireContext(), R.string.AvatarSelectionBottomSheetDialogFragment__taking_a_photo_requires_the_camera_permission, Toast.LENGTH_SHORT)
                                         .show())
                 .execute();
    } else {
      launchOptionAndDismiss(option);
    }
  }

  private void launchOptionAndDismiss(@NonNull SelectionOption option) {
    Intent intent = createIntent(requireContext(), option, requireArguments().getBoolean(ARG_IS_GROUP));

    int requestCode = requireArguments().getShort(ARG_REQUEST_CODE);
    if (getParentFragment() != null) {
      requireParentFragment().startActivityForResult(intent, requestCode);
    } else {
      requireActivity().startActivityForResult(intent, requestCode);
    }

    dismiss();
  }

  private static Intent createIntent(@NonNull Context context, @NonNull SelectionOption selectionOption, boolean isGroup) {
    switch (selectionOption) {
      case CAPTURE:
        return AvatarSelectionActivity.getIntentForCameraCapture(context);
      case GALLERY:
        return AvatarSelectionActivity.getIntentForGallery(context);
      case DELETE:
        return isGroup ? ClearProfileAvatarActivity.createForGroupProfilePhoto()
                       : ClearProfileAvatarActivity.createForUserProfilePhoto();
      default:
        throw new IllegalStateException("Unknown option: " + selectionOption);
    }
  }

  private enum SelectionOption {
    CAPTURE("capture", R.string.AvatarSelectionBottomSheetDialogFragment__take_photo, R.attr.avatar_selection_take_photo),
    GALLERY("gallery", R.string.AvatarSelectionBottomSheetDialogFragment__choose_from_gallery, R.attr.avatar_selection_pick_photo),
    DELETE("delete", R.string.AvatarSelectionBottomSheetDialogFragment__remove_photo, R.attr.avatar_selection_remove_photo);

    private final            String code;
    private final @StringRes int    label;
    private final @AttrRes   int    icon;

    SelectionOption(@NonNull String code, @StringRes int label, @AttrRes int icon) {
      this.code  = code;
      this.label = label;
      this.icon  = icon;
    }

    public @NonNull String getCode() {
      return code;
    }

    static SelectionOption fromCode(@NonNull String code) {
      for (SelectionOption option : values()) {
        if (option.code.equals(code)) {
          return option;
        }
      }

      throw new IllegalStateException("Unknown option: " + code);
    }
  }

  private static class SelectionOptionViewHolder extends RecyclerView.ViewHolder {

    private final AppCompatTextView optionView;

    SelectionOptionViewHolder(@NonNull View itemView, @NonNull Consumer<Integer> onClick) {
      super(itemView);
      itemView.setOnClickListener(v -> {
        if (getAdapterPosition() != RecyclerView.NO_POSITION) {
          onClick.accept(getAdapterPosition());
        }
      });

      optionView = (AppCompatTextView) itemView;
    }

    void bind(@NonNull SelectionOption selectionOption) {
      optionView.setCompoundDrawablesWithIntrinsicBounds(ThemeUtil.getThemedDrawable(optionView.getContext(), selectionOption.icon), null, null, null);
      optionView.setText(selectionOption.label);
    }
  }

  private static class SelectionOptionAdapter extends RecyclerView.Adapter<SelectionOptionViewHolder> {

    private final List<SelectionOption>     options;
    private final Consumer<SelectionOption> onOptionClicked;

    private SelectionOptionAdapter(@NonNull List<SelectionOption> options, @NonNull Consumer<SelectionOption> onOptionClicked) {
      this.options         = options;
      this.onOptionClicked = onOptionClicked;
    }

    @NonNull
    @Override
    public SelectionOptionViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
      View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.avatar_selection_bottom_sheet_dialog_fragment_option, parent, false);
      return new SelectionOptionViewHolder(view, (position) -> onOptionClicked.accept(options.get(position)));
    }

    @Override
    public void onBindViewHolder(@NonNull SelectionOptionViewHolder holder, int position) {
      holder.bind(options.get(position));
    }

    @Override
    public int getItemCount() {
      return options.size();
    }
  }
}